<template>
<section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <!-- 短信登陆 -->
          <div :class="{on:loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone" >
              <button  class="get_verification" :disabled="!right_phone"
              :class="{right_phone:right_phone}" @click.prevent="getCode">
              {{computeTime ? `已发送(${computeTime}s)` : '获取验证码'}}
              </button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <!-- 密码登陆 -->
          <div :class="{on:!loginWay}">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name" >
              </section>
              <section class="login_verification">
                <!-- 是否显示密码 -->
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                <div class="switch_button" :class="showPwd? 'on':'off'" @click="showPwd=!showPwd">
                  <div class="switch_circle" :class="{right:showPwd}"></div>
                  <span class="switch_text">{{showPwd ? 'xxx':'...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha"
                @click="getCaptcha" ref="captcha">
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">
          <router-link to="/landing">关于我们</router-link>
        </a>
      </div>
      <!--利用$router.back()返回上一级路由 -->
      <a href="javascript:" class="go_back" @click="$router.go(-1)">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <!-- 提示组件,closeTip事件在其中被分发出来 -->
    <AlertTip :alertText="alertText" v-show="alertShow" @closeTip='closeTip'/>
  </section>
</template>
<script>
import AlertTip from '../../components/AlertTip/AlertTip.vue'
import  {reqSendCode,reqSmsLogin,reqUserInfo} from '../../api'
export default {
    data(){
      return{
        loginWay:true,
        computeTime:0,//计时为0
        phone:'',
        showPwd:false, //是否显示密码
        code:'',//短信验证码
        pwd:'',//密码
        name:'',//用户名
        captcha:'',//图形验证码
        alertText:'',//提示文本
        alertShow:false,//是否提示警告框
      }
    },
    computed:{
      right_phone(){
        return /^1\d{10}$/.test(this.phone)//用正则方法判断表单号码是否有11位数
      }
    },
    methods:{
     async getCode(){
        if(this.computeTime == 0){
            //启动倒数计时
          this.computeTime = 30
          this.intervalId =  setInterval(() => {
            this.computeTime--
            if(this.computeTime<=0){
              //停止计时
              clearInterval(this.intervalId)
            }
          }, 1000);
          //发送Ajax请求手机号发送短信验证
          const result = await reqSendCode(this.phone)
          if(result.code === 1){
            //显示倒计时
            this.showAlert(result.msg)
            //停止倒计时
            if(this.computeTime){
              this.computeTime = 0
              clearInterval(this.intervalId)
              this.intervalId = undefined
            }
          }
        }
    },
    //开启提示框
    showAlert(alertText){
          this.alertShow = true
          this.alertText = alertText
    },
    async login(){
      let result
      //前台表达验证 先收集数据收集数据一般看input
      if(this.loginWay){//短信登录
        const {right_phone , phone ,code} = this
        if(!this.right_phone){
          //手机号不正确
          this.showAlert('手机号不正确')
          return
        }else if(!/^\d{6}$/.test(code)){
          //验证码必须是6位数
          this.showAlert('验证码必须是6位数')
          return
        }
        //方式ajax请求短信登录
        result = await reqSmsLogin(phone,code)
      }else{//密码登录
         const {name ,pwd, captcha} = this
         if(!this.name){
          //用户名必须指定
          this.showAlert('用户名必须指定')
          return
        }else if(!this.pwd){
          //密码必须指定
          this.showAlert('密码必须指定')
          return
        }else if(!this.captcha){
          //验证码必须指定
          this.showAlert('验证码必须指定')
          return
        }
        //方式ajax请求密码登录
        result = await reqUserInfo({name ,pwd, captcha})
      }
       //停止倒计时
            // if(this.computeTime){
            //   this.computeTime = 0
            //   clearInterval(this.intervalId)
            //   this.intervalId = undefined
            // }
      //根据结果数据处理
      if(result.code === 0){
          const user = result.data
          //将user保存到vue的state
          //去个人中心界面
          this.$router.replace('./Profile')
          this.$store.dispatch('recordUser',user)
        }else{
          const msg = result.msg
          this.showAlert(msg)
          this.getCaptcha()
        }
    },
    //关闭警告框
    closeTip(){
      this.alertShow = false
      this.alertText = ''
    },
    //获取图片验证码
   getCaptcha(){
     this.$refs.captcha.src = "http://localhost:4000/captcha?time" + Date.now();
   }
  },
  components: {
    AlertTip
  }
}
</script>
<style lang="stylus" rel="stylesheet/stylus">
@import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color limegreen
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color limegreen
              font-weight 700
              border-bottom 2px solid limegreen
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid limegreen
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                  color black
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background limegreen
                >.switch_circle
                  //transform translateX(27px)
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                    transform translateX(30px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color limegreen
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999

</style>
